Hadronic physics with the light-front approach

• Grant number: 19/02923-5
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2019
• End date: September 30, 2022
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Joao Pacheco Bicudo Cabral de Mello
• Grantee: Joao Pacheco Bicudo Cabral de Mello
• Host Institution: Pró-Reitoria de Pós-Graduação e Pesquisa. Universidade Cruzeiro do Sul (UNICSUL). São Paulo , SP, Brazil
• City of the host institution: São Paulo

Abstract

In the present project we will use the formulationof the "Quantum Field Theory in the Light-Front (LFQFT)";to study the structure of mesons,baryons and light nuclei from their fundamental constituents, i.e, in terms of their degrees of freedom of quarks and gluons from Quantum Chromodynamics (QCD). The fact of the choice in use of the formulationof the quantum theory in the Light-Front,is that with this formulation we have certain advantageson the usual formulation of the quantum covariant theory at equal times,which will be discussed in this project. However, in the light-front formalism,we have certain problems related to the loss of some symmetries,among these is the loss of rotational symmetry when spaceFock is truncated. The loss of the rotational invariance will bedescription of composite particles of spin-0,which are the pseudoscalar mesons, such asthe pion and the kaon. In the case of spin-1, we havemesons rho, kaon with S = 1, as well as the deuteron. An important part of this project will be the involvement of graduate and undergraduate students, master's and doctorate, in addition to other researchers at the postdoctoral level, researchers,  as well as making requests from visiting researchers. (AU)

Scientific publications

(7)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

CHOI, HO-MEOYNG; FREDERICO, T.; JI, CHUENG-RYONG; DE MELO, J. P. B. C.. Pion off-shell electromagnetic form factors: Data extraction and model analysis. PHYSICAL REVIEW D, v. 100, n. 11, p. 12-pg., 2019-12-23. (17/05660-0, 13/26258-4, 19/02923-5)

MOITA, R. M.; DE MELO, J. P. B. C.; TSUSHIMA, K.; FREDERICO, T.. Exploring the flavor content of light and heavy-light pseudoscalars. Physical Review D, v. 104, n. 9, NOV 1 2021. (19/02923-5, 17/05660-0, 19/00763-0, 13/26258-4)

CHOI, HO-MEOYNG; FREDERICO, T.; JI, CHUENG-RYONG; DE MELO, J. P. B. C.. Pion off-shell electromagnetic form factors: Data extraction and model analysis. Physical Review D, v. 100, n. 11, DEC 23 2019. (19/02923-5, 13/26258-4, 17/05660-0)

LEAO, JURANDI; DE MELO, J. P. B. C.; FREDERICO, T.; CHOI, HO-MEOYNG; JI, CHUENG-RYONG. Off-shell pion properties: Electromagnetic form factors and light-front wave functions. PHYSICAL REVIEW D, v. 110, n. 7, p. 17-pg., 2024-10-28. (19/07767-1, 23/09539-1, 19/02923-5)

MOITA, R. M.; DE MELO, J. P. B. C.; FREDERICO, T.; DE PAULA, W.. Pion inspired by QCD: Nakanishi and light-front integral representations. PHYSICAL REVIEW D, v. 106, n. 1, p. 22-pg., 2022-07-01. (19/02923-5, 19/07767-1, 17/05660-0)

LEAO, J.; DE MELO, J. P. B. C.. Pseudoscalar current and covariance with the light-front approach. REVISTA MEXICANA DE FISICA, v. 69, n. 6, p. 14-pg., 2023-11-01. (19/02923-5, 17/05660-0, 13/26258-4)

YABUSAKI, G. H. S. O.; DE MELO, J. P. B. C.; TSUSHIMA, K.; FREDERICO, T.; DE PAULA, W.. Kaon structure in the nuclear medium within the light front approach. PHYSICAL REVIEW D, v. 109, n. 5, p. 12-pg., 2024-03-18. (19/07767-1, 19/02923-5, 19/00763-0, 23/07313-6)